Speed limit is for controlling how fast a driver can go within certain cities, towns, and states. Speed limit can be detected by electronic. Speed Limits are posted to help the community be safe, without speed limits I’m pretty sure people would be 80mph on the streets for nothing and would probably hurt somebody going that fast because they are going too fast to see them crossing the street or anything, maybe worker working on the street. The most important reason speed limits are very important is School Zones, when little kids are going or getting out of school I wouldn’t want my child getting hurt going or getting out of school cause a careless person wants to speed, or maybe a couple of kids want to play kickball an kicks the ball in the